Sand disturbance system and method thereof

ABSTRACT

The present invention relates to a sand disturbing system which includes a sand disturbance boat, wherein the sand disturbance boat includes: at least one floating body floating on water current; and at least one baffle disposed on the floating body, and inserted into the water current when disturbing sand, wherein a spacing is present between an edge of the baffle and a riverbed, and the baffle is adapted to disturbing sediment on the riverbed when the water current flows through the spacing. The sand disturbance method can be executed by the sand disturbance system according the invention. The present invention can enhance disturb sand effect and completely control inundation, and the implementing method is simple and easy to be promoted in the Yellow River and a variety of river water areas.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese Patent Application No. 200810239060.3, filed on Dec. 5, 2008, entitled “Sand Disturbance System and Method Thereof”, the content of which is incorporated herein by reference in its entirety.

FIELD OF THE TECHNOLOGY

The present invention relates to Water and Sediment Regulation technology, particularly to a sand disturbance system and a sand disturbance method executed by the system.

BACKGROUND

From time immemorial, water lack and sand excessiveness and the imbalance between water and sand are the roots of the Yellow River inundation. The Yellow River carries 16 hundred millions tons of sand into downstream, and 4 hundred millions tons of sand deposits on the downstream riverbed such that the downstream riverbed uplifts in an average rate of 10 cm/year. At present, the downstream riverbed is average 4 to 6 meters higher than river adjacent land, which forms the world famous “aboveground river”.

In recent years, our country put forward control measures for “Water and Sediment Regulation” aiming at the fact of the Yellow River, that is, the riverbed undercutting is realized by virtue of the kinetic energy of water and with assistance of artificial disturbance of riverbed sediment, such that the maximum sand is transferred to the sea. Where artificial disturbance of riverbed sediment mainly adopts sand disturbance boat with air compressor and high pressure muzzle, exerts a high pressure impact about 0.5 meters above the sediment deposition surface to disturb the deposited sediment of the area sufficiently. The high pressure muzzle of this kind of sand disturbance boat has a small impact area when exerts high pressure impact on sediment deposition surface, for large-area sediment deposition reach of the Yellow River, the effect of sand disturbance is not obvious. However, in the prior art, the control usually is performed only in seriously sediment deposited areas, and the disturbed sand will deposit next reach. Therefore, it is not possible to achieve the purpose of complete control of sediment, and it has a very high cost for the sand control of the whole river so that it is difficult to achieve the complete control.

SUMMARY

The object of the present invention is to provide a sand disturbance system and method thereof to increase the effect of sand disturbance and completely control inundation.

In order to achieve above object, the present invention provides a sand disturbing system which includes a sand disturbance boat, wherein the sand disturbance boat includes:

at least one floating body floating on water current; and

at least one baffle disposed on the floating body, and inserted into the water current when disturbing sand, wherein a spacing is present between an edge of the baffle and a riverbed, and the baffle is adapted to disturbing sediment on the riverbed when the water current flows through the spacing.

In order to achieve above object, the present invention also provides a sand disturbing method, including:

inserting a baffle disposed on a floating body of a sand disturbance boat into water current, wherein a spacing is present between an edge of the baffle and a riverbed; and

the baffle driving the floating body to run downstream with a push of the water current, wherein sediment is disturbed and flowed away when the water current flows through the spacing.

It can be seen from the above technical solution that the present invention adopts baffle obstruct water current, makes the water current rapidly through a spacing between baffle edge and a riverbed to disturb and flows away sediment. This technical means overcomes the technical problem in prior art that when the high pressure muzzle of sand disturbance boat exerts a high pressure impact on sediment deposition surface, the impacted area is smaller with respect to the Yellow River vast sediment deposition reach, and sand disturbance effect is not obvious. Moreover, with the running of floating body, the sand regulation can be performed in areas of Long River, which completely control the sediment deposition problem. The present invention can enhance disturb sand effect and completely control inundation, and the implementing method is simple and easy to be promoted in the Yellow River and a variety of river water areas.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side view of sand disturbance principle by water current of the sand disturbance system according to the present invention;

FIG. 2 is a riverway section view of sand disturbance principle by water current of the sand disturbance system according to the present invention;

FIG. 3 is a structure schematic view of Embodiment 1 of the sand disturbance system according to the present invention;

FIG. 4 is a structure schematic view of Embodiment 2 of the sand disturbance system according to the present invention;

FIG. 5 is a structure schematic view illustrating the baffle moving away from the water surface in Embodiment 2 of the sand disturbance system according to the present invention;

FIG. 6 is a structure schematic view of Embodiment 3 of the sand disturbance system according to the present invention;

FIG. 7 is a structure schematic view of Embodiment 4 of the sand disturbance system according to the present invention;

FIG. 8 is a structure schematic view of Embodiment 5 of the sand disturbance system according to the present invention;

FIG. 9 is a structure schematic view of Embodiment 6 of the sand disturbance system according to the present invention;

FIG. 10 is a flowchart of the embodiment of the sand disturbance method according to the present invention.

In figures:

 1 floating body  2 baffle  3 wheel disc  4 flexible chain  5 generator  6 first power device  7 pivot spindle  8 second power device  9 transimission  10 commutator  11 first floating body  12 second floating   body  41 first flexible chain  42 second flexible chain 101 first pulley 102 second pulley 103 third pulley 104 fourth pulley  31 first wheel disc  32 second wheel disc 105 first engaging and   disengaging gear 106 second engaging 107 fourth power plant 108 fifth power plant   and disengaging   gear 109 third power plant

DETAILED DESCRIPTION

As shown in FIG. 1, it is a side view of sand disturbance principle by water current of the sand disturbance system according to the present invention, a sand disturbance system according to the present invention mainly includes a sand disturbance boat, wherein the sand disturbance boat includes at least one floating body 1, and at least one baffle 2 disposed on the floating body 1. When the baffle 2 is inserted into the river and an angel is formed between the direction of the water current and the baffle 2, the baffle 2 drives the floating body 1 to run with a push of water current. The water current flows rapidly through a spacing between the edge of baffle 2 and the bottom of riverbed with the obstruct of baffle 2, and disturbs sediment of the riverbed. According to the principle that the ability of carrying sand for water current has a direct ratio with the square of water current velocity, if the angle between baffle 2 and water current direction is increased, then the spacing between the edge of baffle 2 and the bottom of riverbed is reduced, and the velocity of water currents though the spacing increases, such that the sand disturbance effect of the sand disturbance boat in the sand disturbance system according to the present invention is more obvious, and the velocity of downcutting the bottom of riverbed is more rapid; Similarly, FIG. 2 shows a riverway section view of sand disturbance principle by water current of the sand disturbance system according to the present invention. When the angle between baffle 2 and water current direction is increased, the spacing between the edge of baffle 2 and both sides of riverbed is reduced, and the velocity of water currents though the spacing of both sides increases correspondingly, such that the widening speed of both sides of riverbed by using the sand disturbance boat in the sand disturbance system according the present invention is more rapid.

Embodiment 1 of the Sand Disturbance System

As shown in FIG. 3, it is a structure schematic view of Embodiment 1 of the sand disturbance system according to the present invention. The system can be disposed in the Yellow River, and disturb sand by use of the directional water current in the river. The system includes a wheel disc 3 and a sand disturbance boat consisted of a floating body 1 and a baffle 2. The sand disturbance boat is connected to the wheel disc 3 by a flexible chain 4, wherein the wheel disc 3 is fixedly disposed relatively to the water current, it can be fixedly insert into the river bottom, and also can be fixedly on dam or bank. The sand disturbance boat includes at least one floating body 1 floating on the water current, wherein the common hull may serve as the floating body 1; at least one baffle 2 disposed on the floating body 1, wherein when disturbing sand, the baffle 2 is inserted into the water current, and an angel is formed between the direction of water current and the direction of the baffle 2. The angel is lager than 0 degree and smaller than 90 degree. The baffle 2 is used to drive the floating body 1 to run downstream with the push of the water current and control the velocity of the floating body 1 smaller than the velocity of the water current. A spacing is present between the edge of the baffle 2 and the riverbed, when the floating body 1 runs, the water current is pressed to flow rapidly through the spacing so as to disturb up the sediment of riverbed, which serves as effect of sand disturbance. The disturbed sediment can be flowed away downstream.

In the embodiment, the floating body 1 is connected to the wheel disc 3 by using the flexible chain 4, one end of the flexible chain 4 is fixedly connected to the floating body 1 and the other end of the flexible chain 4 winds around the wheel disc 3. When the floating body 1 runs downstream with the push of the water current, the flexible chain 4 is dragged to drive the wheel disc 3 to rotate together. In the application, the advantage of using the flexible chain 4 and the wheel disc 3 is that the floating body 1 can be controlled and drawn back to the start position by winding the flexible chain 4 after the floating body 1 runs a distance.

The sand disturbing process of sand disturbance system in the embodiment is as follows:

Firstly, a baffle is inserted into the water current and the baffle drives a floating body to run together downstream with the push of the water current; the baffle obstructs the water current, such that the water current flows through a spacing between a baffle edge and a riverbed, disturbs and flows away sediment of riverbed; and the sediment of riverbed passed by the floating body is disturbed and flowed away. In the process, the floating body drags the flexible chain to be loosened from the wheel disc, then the wheel disc rotates in the loosened direction of the flexible chain.

In the embodiment, the sand disturbance system obstructs the water current by the baffle immerges in the water current all the time, which increases the kinetic energy of the water current through the spacing between baffle edge and riverbed. The kinetic energy of the water current is used sufficiently to directly disturb and flow away sediment, which completely controls the inundation and enhance the effect of disturbing sand. Moreover, the system has a simple structure and is prone to form a large-scale disturbing sand project in vast water area, in particular to disposed in the Yellow River, the water current of which carries abundant sediment and is not suit for sailing, therefore the open water area can be used to construct large-scale sand disturbance project which is consisted by sand disturbance system according to the embodiment. In the large-scale sand disturbance project, the width of baffle or floating body is disposed according to the flux of the Yellow River to disturb the maximum sand, and a plurality of sand disturbance boats are disposed in series from the middle reaches of the Yellow River to the Yellow River estuary. Through the disturbance of sand disturbance boat, which loosens or flows up the riverbed sediment and changes riverbed section morphology, such that the section becomes narrow and deep. By use of the sand transfer ability of sand disturbance water current according to the embodiment, abundant sand can be transferred to sea, in particular the coarse sand on riverbed is disturbed and transferred to sea, which enhance the riverway's sand transfer ability. Through promoting the sand disturbance system according to the embodiment in large area, the sate of “aboveground river” of the Yellow River can be changed completely.

When the Yellow River floods, the sand disturbance boat of the embodiment can widen the riverway in a short time, increase the riverway's water passing ability, and control the inundation of the Yellow River.

Furthermore, the sand disturbance system in the embodiment also includes generator 5, which is connected to the rotation axis of the wheel disc 3 by transmission 9, when the wheel disc 3 rotates, the generator 5 is driven for generating power.

The above technical solution not only uses the structure of floating body and baffle to realize sand disturbance, but also use the movement of floating body running downstream to drive the wheel disc to rotate, and the wheel disc's rotation transfers to the generator for generating power.

Embodiment 2 of the Sand Disturbance System.

As shown in FIG. 4, it is a structure schematic view of Embodiment 2 of the sand disturbance system in accordance with the present invention. The present embodiment is based on the above Embodiment 1 and is further provided with a first power device 6. The first power device 6 which may be an electromotor is connected with the wheel disc 3 and is adapted to drive the wheel disc 3 to rotate when the sand disturbance stops. The rotation of the wheel disc 3 may wind the flexible chain 4 so as to drive the floating body 1 to run in the upstream direction and re-wind the flexible chain 4 onto the wheel disc 3.

The technical solution of the present embodiment enables the floating body not only to run downstream for sand disturbance but also to run upstream back to the starting position under the power device's driving so as to restart the next sand disturbance.

During the sand disturbance stops and the floating body 1 runs upstream back, the baffle 2 is preferably moved out of the water current so as to reduce resistance, as shown in FIG. 5. Specifically, one end of the baffle 2 may be pivotally connected with the floating body 1 and a pivot spindle 7 is disposed horizontally. The pivot spindle 7 may be connected with a second power device 8. When the floating body 1 runs downstream for sand disturbance, the second power device 8 drives the pivot spindle 7 to rotate so as to change the spacing between the baffle 2 and the riverbed. When the floating body 1 runs upstream and the sand disturbance stops, the second power device 8 drives the pivot spindle 7 to rotate so as to drive the baffle 2 to rotate until the baffle 2 is upwarping and moves away from the water current. As shown in FIG. 5, the baffle 2 is rotated to become over the water surface.

In the above technical solution, the baffle pivotally connected to the floating body may conveniently changes positions. When the floating body is running downstream for sand disturbance, the baffle is inserted into water; and when it is running upstream and the sand disturbance stops, the baffle is moved away from water to reduce resistance. Furthermore, during sand disturbance downstream, the amount of the thrust borne by the baffle may be adjusted by adjusting the angle of the baffle with water so as to accommodate different practical needs.

Embodiment 3 of the Sand Disturbance System

As shown in FIG. 6, it is a structure schematic view of Embodiment 3 of the sand disturbance system in accordance with the present invention. The present embodiment is based on the above Embodiment 2 and is further provided with a plurality of sand disturbance boats in series along water current. The sand disturbance boats are connected with each other end to end by the flexible chain 4.

The technical solution of the present embodiment enables a plurality of floating bodies not only disturb sand at the same time when running downstream, but also run upstream back to the starting position under one power device's driving.

In the Embodiment, when a plurality of floating bodies 1 disturb sand downstream, a plurality of baffles 2 are inserted into the river at the same time; During the sand disturbance stops and a plurality of floating bodies 1 runs upstream back, a plurality of baffles 2 are moved out of the water current so as to reduce resistance. Specifically, When a plurality of floating bodies 1 run downstream for sand disturbance, the second power device 8 drives the pivot spindle 7 of each floating body 1 to rotate so as to drive each baffle 2 to rotate, and to keep a spacing between the baffle 2 and the riverbed. When the floating bodies 1 runs upstream and the sand disturbance stops, the second power device 8 drives the pivot spindle 7 of each floating body 1 to rotate so as to drive the baffle 2 to rotate and until the baffle 2 is upwarping and moves away from the water current.

In the above technical solution, a plurality of sand disturbance boats are disposed in series along water current, a plurality of floating bodies 1 running simultaneously enhances the disturbance to the sediment of riverbed, and one power device drives wheel discs to rotate with winding the first flexible chain to drive all the floating bodies run upstream.

Furthermore, in this embodiment, the generator 5 can also be disposed to be connected to the rotation axis of wheel disc 3 via transmission 9, and when a plurality of sand disturbance boats in this embodiment run downstream, the push force of the water current to baffle 2 increases, such that when the wheel disc 3 is driven to rotate, the power of generating power of the generator 5 increases.

Embodiment 4 of the Sand Disturbance System

As shown in FIG. 7, it is a structure schematic view of Embodiment 4 of the sand disturbance system in accordance with the present invention. In the technical solution of the embodiment, there are one wheel disc 3 and two floating bodies, that is, a first floating body 11 and a second floating body 12. A first flexible chain 41 and a second flexible chain 42 connected to the two floating bodies respectively connect to the wheel disc 3 via the pulley block. The first flexible chain 41 of the first floating body 11 is connected via the first pulley 101 to the wheel disc 3 disposed on the bank, and the second flexible chain 42 of the second floating body 12 is connected to the wheel disc 3 disposed on the bank via a second pulley 102, a third pulley 103 and a forth pulley 104. The running route is serial between the first floating body 11 and the second floating body 12, and they are not overlapped in water current direction.

Two flexible chains wind around the wheel disc independently. During work, one of the flexible chains is in winding state, and the other flexible chain is in loose state; One of floating bodies runs downstream with the push of water current, obstructs water current to disturb sand, and drives the wheel disc to rotate; the other floating body runs upstream under the drive of the rotated wheel disc, and the two floating bodies run downstream and upstream alternately.

Furthermore, in the embodiment, the generator 5 is connected to the rotation axis of wheel disc 3 via a transmission 9 and a commutator 10 when the two floating bodies 1 run downstream and upstream alternately, the commutator 10 can change the rotating direction of the rotation axis of the wheel disc 3, such that the generator 5 generates power continuously.

In the above technical solution, the two floating bodies disturb sand alternately and the running scopes which are not overlapped can avoid the interlacement and jam between the floating body and flexible chain.

Embodiment 5 of the Sand Disturbance System

As shown in FIG. 8, it is a structure schematic view of Embodiment 5 of the sand disturbance system according to the present invention. In the embodiment, there are two wheel discs, that is, a first wheel disc 31 and a second wheel disc 32, around which one flexible chain winds respectively, that is a first flexible chain 41 and a second flexible chain 42. One of the flexible chains is in a winding state and the other flexible chain is in a loose state; There is one generator 5, wherein a first transmission 9 connected to the rotation axis of the first wheel disc 31 and a second transmission 9 connected to the rotation axis of the second wheel disc 32 are respectively connected to the generator 5 by a first engaging and disengaging gear 105 and a second engaging and disengaging gear 106, and the first engaging and disengaging gear 105 and the second engaging and disengaging gear 106 can be clutch or ratchet wheel; The other end of the rotation axis of the first wheel disc 31 is connected to a forth power device 107 and the other end of the rotation axis of the second wheel disc 32 is connected to a fifth power device 108; One end of each flexible chain is respectively connected to one floating body, that is, the first floating body 11 and the second floating body 12, wherein one floating body runs downstream with the push of water current and drives the wheel disc to rotate, such that the generator 5 is driven to rotate for generating power, the engaging and disengaging gear connected to the other wheel disc separates the rotation axis of the other wheel disc from the generator 5, then the other wheel disc rotates under the drive of the power device and drives the connected floating body to run upstream; the two flexible chains of the two floating bodies are connected to respective wheel disc through pulley block, and the running scopes of the two floating bodies are not overlapped in water current direction.

the combination of two group wheel discs, flexible chains and floating bodies are further used, wherein the two floating bodies disturb sand alternately, the two wheel discs drive one generator for generating power, and an engaging and disengaging gear control the connecting and disconnecting of the wheel disc with the generator. The two floating bodies generate power downstream and return back upstream alternately, wherein, the power device drives the floating body to be back upstream. Therefore, the generator can generate power continuously with the drive of the two wheel discs. The returning velocity of the floating body upstream is preferably higher than the velocity of the other floating body running downstream, which can ensure that the returned floating body has the time interval for receiving the baffle to avoid the abrupt power change of generating power and ensure that the generator can generate power continuously.

Embodiment 6 of the Sand Disturbance System

As shown in FIG. 9, it is a structure schematic view of Embodiment 6 of the sand disturbance system according to the present invention. In the embodiment, a third power device 109 such as an engine is disposed on the floating body 1, which is used to drive the floating body 1 to run when disturbing sand such that the floating body 1 has a velocity difference with water current. The velocity difference is a preset value, which is a positive velocity difference or a negative velocity difference. When the preset velocity difference is positive, the third power device 109 drives the floating body 1 to run downstream; When the preset velocity difference is negative, the third power device 109 drives the floating body 1 to run upstream in the embodiment, the third power device 109 is adjusted on power to realize the velocity difference up to the preset value between the floating body 1 and the water current, that is, when driving the floating body 1 to run upstream, the power of the third power device 109 is more higher than that when running downstream.

The third power device of the sand disturbance system in the embodiment drives the floating body to form a preset relative velocity difference with the water current, which increases correspondingly the kinetic energy of the water currents through the spacing between the baffle edge and the riverbed and makes the floating body disturb sand neatly.

Embodiment of the Sand Disturbance Method

As shown in FIG. 10, it is a flowchart view of Embodiment of the sand disturbance method according to the present invention. The method can be specifically executed by the embodiments of the sand disturbance system according to the present invention, which includes the following steps.

Step 100: The baffle disposed on the floating body is inserted into the water current, a spacing is present between the baffle edge and the riverbed, and an angel is formed between the baffle and the flowing direction of the water;

Step 200: The baffle drives the floating body to run downstream with the push of water current, and the water current is obstructed by the baffle and flows through the spacing to flow away sediment.

Wherein the floating body is connected to one end of a flexible chain; the other end of the flexible chain is wound around a wheel disc fixedly disposed relatively to the water current. Therefore, when the baffle drives the floating body to run downstream with the push of water current, the step 300 can further be executed. The step 300 is that the floating body drags the wound flexible chain to be loosened and the dragged flexible chain drives the wheel disc to rotate. The connected flexible chain can receive the floating body back conveniently to the start position when the sand disturbance stops.

The sand disturbance method of the embodiment can be specifically executed by the embodiments of the sand disturbance system according to the present invention. The baffle inserted into the water current drives the floating body to run downstream together with the push of the water current, the water current is obstructed and flows through the spacing between the baffle edge and the riverbed to disturb and flow away the sediment of the riverbed. With the running of the floating body, the sediment on the area the floating body passed all can be disturbed and flowed away.

In the technical solution of the embodiment, the obstructing of baffle to the water current increases the kinetic energy of water currents through the spacing between the baffle edge and the riverbed such that the sediment on the bottom and two sides of the riverbed is disturbed and flowed away, which increases the sand disturbance effect.

Furthermore, based on the embodiment, the horizontal movement of the floating body is transformed to the rotation of the wheel disc via the flexible chain for generating power. Therefore, the rotation axis of the wheel disc can be connected to a generator, when the flexible chain drives the wheel disc to rotate, the rotating wheel disc drives the generator for generating power.

The adoption of the above solution not only realizes the sand disturbance and sand control but also is used for generating power, which makes use of the water resource and enhances the economic benefit.

Based on the embodiment, to ensure the operational continuity of the floating body disturbing sand, the following steps can be executed after the floating body runs until the flexible chain is loosened from the wheel disc, and the floating body is driven to return upstream.

Step 400: A first power device is started to drive the floating body to run upstream.

Step 500: During the floating body running upstream, the wheel disc rotates to wind up the flexible chain.

The above first power device may be fixedly disposed relatively to the water current and be connected to the wheel disc to drive the floating body to run upstream through driving the wheel disc to rotate.

In order to reduce the resistance of the floating body returning upstream, before starting the first power device, the baffle may be moved away from the water current, for example, when one end of the baffle is pivotally connected to the floating body, as described in above embodiment of the sand disturbance system, the horizontal pivot spindle between one end of the baffle and the floating body is be driven until the pivotally connected baffle rotates to warp over the water surface or float on the surface so as to be moved away from the water for resistance reduction.

The sand disturbance method in accordance with the present invention may be further provided with one wheel disc, two flexible chains and two floating bodies. When one of the two floating bodies runs downstream and drags the flexible chain to drive the wheel disc to rotate, the rotation axis of the wheel disc drive the generator for generating power. And the rotation of the wheel disc winds around the other flexible chain to drive the other floating body to run upstream. The two floating bodies run downstream and upstream alternately, and the commutator enables to change the rotating direction of the wheel disc, which can insure that the generator can generate power continuously. The above technical solution can be realized by adopting the device in the embodiment 4 of the sand disturbance system according to the present invention.

The sand disturbance method in accordance with the present invention may be further provided with two groups of wheel discs, flexible chains and floating bodies which are connected together, one group includes a first wheel disc, a first flexible chain and a first floating body, which operate as the above described method embodiment, and the other group includes a second wheel disc, a second flexible chain and a second floating body, which also operate as the above described method embodiment. The work flow of the two system's cooperative work is specifically as follows: when the first floating body runs downstream and the first flexible chain is dragged to drive the first wheel disc to rotate, the rotation axis of the rotating first wheel disc is engaged with a generator via a first clutch and drives the generator to rotate for generating power via a commutator, at the same time, the second wheel disc connected to the second floating body is disconnected to the generator, and the power device drives the second disc to rotate. The rotating second wheel disc winds the second flexible chain connected to the second wheel disc, and the second flexible chain drags the floating body connected to second flexible chain to run upstream in water current. The two floating bodies run downstream and upstream alternately and the clutches respectively connected to the two floating bodies engage with the generator when the connected floating body runs downstream and disconnected from the generator when the connected floating body runs downstream. The velocity of the power device driving one floating body to run upstream may be equal to, preferably higher than that of the other floating body running downstream, which ensures that the returned floating body has a time interval to receive the baffle and avoids the abrupt change of power to ensure the continuous generating power of the generator. The above technical solution can be realized by adopting the device in the embodiment 5 of the sand disturbance system according to the present invention.

In the sand disturbance method according to the invention, a third power device such as an engine may be disposed. When disturbing sand, the third power device drives the floating body to run so as to form a velocity difference between the floating body and the water current. The velocity difference is a preset value which may be a positive one or a negative one. When the preset velocity difference is a positive one, the third power device drives the floating body to run downstream and when the preset velocity difference is a negative one, the third power device drives the floating body to run upstream. In the embodiment, the relative velocity difference between the floating body and the water current can be up to the preset value through adjusting the power of the third power device, that is, when the floating body is driven to run upstream, the power of the third power device is much higher than that of the floating body runs downstream. The sand disturbance method of the embodiment forms a preset relative velocity difference between the floating body and the water current through the power device's driving, which increases the kinetic energy of the water currents through the spacing between the baffle edge and the riverbed and makes the floating body perform sand disturbance neatly.

The sand disturbance method of the present invention may specifically executed by any one embodiment of the sand disturbance system in accordance with the present invention. However, it is not only limited to this. The sand disturbance system adapting the baffle obstruct water current and make the water current through the spacing between the baffle edge and the riverbed to current away the sediment of riverbed may also be used to execute the sand disturbance method of the present invention.

Though illustration and description of the present disclosure have been given with reference to preferred embodiments thereof, it should be appreciated by persons of ordinary skill in the art that various changes in forms and details can be made without deviation from the spirit and scope of this disclosure, which are defined by the appended claims. 

1. A sand disturbance system, comprising a sand disturbance boat, wherein the sand disturbance boat comprises: at least one floating body floating on water current; and at least one baffle disposed on the floating body, and inserted into the water current when disturbing sand, wherein a spacing is present between an edge of the baffle and a riverbed, and the baffle is adapted to disturbing sediment on the riverbed when the water current flows through the spacing.
 2. The system according to claim 1, further comprising: a wheel disc fixedly disposed relatively to the water current; and a flexible chain wherein one end of the flexible chain fixedly is connected to the floating body, the other end of the flexible chain is wound around the wheel disc, and when the floating body runs downstream with a push of the water current, the wound flexible chain is dragged to drive the wheel disc to rotate.
 3. The system according to claim 2, further comprising: a generator connected to a rotation axis of the wheel disc via a transmission, and driven for generating power when the wheel disc rotates,.
 4. The system according to claim 2, further comprising: a first power device connected to the wheel disc and adapted to drive the wheel disc to rotate to wind the flexible chain around the wheel disc so as to drive the floating body to run upstream when stopping disturbing sand.
 5. The system according to claim 1, wherein one end of the baffle is pivotally connected to the floating body and a pivot spindle is disposed horizontally; and the system further comprises a second power device connected to the pivot spindle, and the second power device is adapted to drive the baffle to rotate such that the spacing between the baffle and the bottom of the riverbed is changed when the floating body runs downstream and disturbs sand, and to drive the baffle to rotate until the baffle moves away from the water current when the floating body runs upstream.
 6. The system according to claim 1, wherein a plurality of sand disturbance boats are disposed in series in a direction of the water current.
 7. The system according to claim 2, wherein there are two floating bodies and two flexible chains, the two flexible chains connected to the two floating bodies are connected with one wheel disc respectively via a pulley block one of the two flexible chains is in a winding state, the other flexible chain is in a loose state; one of the two floating bodies runs downstream with the push of the water current so as to drive the wheel disc to rotate, the other floating body runs upstream with the drive of the rotating wheel disc, and running scopes of the two floating bodies are not overlapped in the direction of the water current.
 8. The system according to claim 3, wherein there are two wheel discs with one flexible chain respectively wound thereon, one of the flexible chains is in a winding state, the other flexible chain is in a loose state; there is one generator, two transmissions respectively connected to rotation axes of the two wheel discs are connected to two ends of the generator respectively via a clutch or a ratchet wheel, the other ends of the rotation axes of the two wheel discs are respectively connected to a power device; one end of each flexible chain is connected with one floating body respectively, flexible chains of the two floating bodies are connected with the two wheel discs respectively via a pulley block; one of the floating bodies runs downstream with the push of the water current and drives the wheel disc to rotate so as to drive the generator to rotate for generating power, the wheel disc connected to the other floating body rotates with the drive of the power device so as to drive the connected floating body to run upstream; and running scopes of the two floating bodies are not overlapped in a direction of the water current.
 9. The system according to claim 1, further comprising: a third power device, disposed on the floating body and adapted to drive the floating body to form a preset velocity difference with the water current when disturbing sand.
 10. A sand disturbance method, comprising: inserting a baffle disposed on a floating body of a sand disturbance boat into water current, wherein a spacing is present between an edge of the baffle and a riverbed; and driving, by the baffle, the floating body to run downstream with a push of the water current, wherein sediment is disturbed and flowed away when the water current flows through the spacing.
 11. The method according to claim 10, wherein when the baffle drives the floating body to run downstream with the push of the water current, the method further comprises: dragging, by the floating body, a flexible chain connected to the floating body, wherein the other end of the flexible chain is wound around a wheel disc fixedly disposed relatively to the water current such that the dragged flexible chain drives the wheel disc to rotate.
 12. The method according to claim 11, wherein when the floating body drags the flexible chain and the dragged flexible chain drives the wheel disc to rotate, the method further comprises: driving, by the rotating wheel disc, a generator connected to the wheel disc for generating power.
 13. The method according to claim 11, wherein after the floating body drags the flexible chain and the dragged flexible chain drives the wheel disc rotate until the flexible chain loose from the wheel disc, the method further comprises: starting a first power device to drive the floating body to run upstream; and rotating, by the wheel disc, so as to wind the flexible chain during the upstream running of the floating body.
 14. The method according to claim 13, wherein before starting the first power device, the method further comprises: moving the baffle away from the water current.
 15. The method according to claim 14, wherein the step of moving the baffle away from the water current specifically comprises: driving a pivot spindle between an end of the baffle and the floating body to rotate until the baffle is moved away from the water current.
 16. The method according to claim 13, wherein the step of starting a first power device to drive the floating body to run upstream specifically comprises: starting the first power device fixedly disposed relatively to the water current to drive the wheel disc to rotate so as to drive the floating body to run upstream.
 17. The method according to claim 12, wherein the step of driving, by the rotating wheel disc, a generator connected to the wheel disc for generating power when the floating body drags the flexible chain and the dragged flexible chain drives the wheel disc to rotate specifically comprises: the floating body, the flexible chain and the wheel disc specifically being a first floating body, a first flexible chain and a first wheel disc, and when the first floating body drags the first flexible chain and the dragged first flexible chain drives the first wheel disc to rotate, the rotating first wheel disc engaging with the generator via a first clutch and driving the generator for generating power; at the same time, disconnecting a second wheel disc from the generator via a second clutch, driving the second wheel disc to rotate, the rotating second wheel disc winding a second flexible chain connected to the second wheel disc, and the second flexible chain dragging a second floating body connected to the second flexible chain to run upstream in the water current, wherein the first floating body and the second floating body run downstream and upstream alternately, and their connected clutches engage to the generator when the connected floating bodies run downstream and disengage to the generator when the connected floating bodies run upstream.
 18. The method according to claim 10, wherein when the floating body disturbs sand, the method further comprises: starting a third power device to drive the floating body to form a preset velocity difference with the water current. 